229529991 has 4 divisors (see below), whose sum is σ = 306039992. Its totient is φ = 153019992.

The previous prime is 229529969. The next prime is 229530017. The reversal of 229529991 is 199925922.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 229529991 - 2⁵ = 229529959 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 229529991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (229529941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38254996 + ... + 38255001.

It is an arithmetic number, because the mean of its divisors is an integer number (76509998).

Almost surely, 2^229529991 is an apocalyptic number.

229529991 is a deficient number, since it is larger than the sum of its proper divisors (76510001).

229529991 is an equidigital number, since it uses as much as digits as its factorization.

229529991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76510000.

The product of its digits is 262440, while the sum is 48.

The square root of 229529991 is about 15150.2472257056. The cubic root of 229529991 is about 612.2749336070.

The spelling of 229529991 in words is "two hundred twenty-nine million, five hundred twenty-nine thousand, nine hundred ninety-one".